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Monitoring response to therapy in melanoma by quantifying circulating tumour DNA with droplet digital PCR for BRAF and NRAS mutations

Open access
Chang-Hao Tsao, Simon, Weiss, Jonathan, Hudson, Christopher, Christophi, Christopher, Cebon, Jonathan, Behren, Andreas, Dobrovic, Alexander·2015·Scientific Reports

Abstract

We assessed the utility of droplet digital PCR (ddPCR) to evaluate the potential of using circulating tumour DNA (ctDNA) as a post therapy monitoring tool in melanoma by comparing it to serum LDH levels and RECIST scores. ddPCR was shown to be reliable in distinguishing mutant from wild type alleles with no false positives. Subsequently, we quantified ctDNA (V600EBRAF,V600KBRAF or Q61HNRAS) in 6 stage IV melanoma patients across several time points during their treatment course. All tested patients had detectable ctDNA, which exhibited dynamic changes corresponding to the changes in their disease status. The ctDNA levels fell upon treatment response and rose with detectable disease progression. In our group of patients, ctDNA was more consistent and informative than LDH as a blood-based biomarker. In addition, BRAF mutant ctDNA as detected by ddPCR could be used diagnostically where the tumour block was unavailable. In conclusion, this study demonstrates the applicability of using ddPCR to detect and quantify ctDNA in the plasma of melanoma patients.

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Metadata

Authors
Chang-Hao Tsao, S., Weiss, J., Hudson, C., Christophi, C., Cebon, J., Behren, A., & Dobrovic, A.
Venue
Scientific Reports
Published
2015-06-22
Volume
5
Issue
1
Pages
11198-11198
ISSN
2045-2322 (ISSN-L)
OpenAlex
W745076224
Cited by
173
References
4
FWCI
9.42
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Monitoring response to therapy in melanoma by quantifying circulating tumour DNA with droplet digital PCR for BRAF and NRAS mutations. https://app.cochat.ai/papers/10.1038/srep11198
The paper
Chang-Hao Tsao, S., Weiss, J., Hudson, C., Christophi, C., Cebon, J., Behren, A., & Dobrovic, A. (2015). Monitoring response to therapy in melanoma by quantifying circulating tumour DNA with droplet digital PCR for BRAF and NRAS mutations. Scientific Reports. https://doi.org/10.1038/srep11198

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Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.